No of course not, nothing can teach you this expect sparring, mitts, bag, shadowboxing etc. This is about technique and it comes with experience. However, it improves the conditioning of your feet so that you can do those things better and for longer periods.
You can practice jumping backwards and forwards, side to side when jumping rope but jumping is a completely different movement pattern to being in a boxing stance, moving around a ring.
No, I didn't say it magically brought you from zero to a hundred. I said it helps. Growing acclimated to aerobic and anaerobic activity while maintaining balance on your toes and the ***** of your feet is a core component of footwork in boxing, and skipping rope undeniably helps with that. What you've said is basically akin to arguing that calculators won't help you with any math problem because they can't plot out a graph, or solve algorithms, or figure the cube root of π to a million decimal places. No, simply owning a calculator won't magically take you from ignorance to enlightenment, but it will help you with math problems. Simply owning a rope, or even skipping with it regularly, won't magically imbue you with the knowledge of all the ins and outs concerning footwork in boxing. It will, however, acclimate you to a perpetual hopping-on-your-toes state for long periods.
Nobody jumps with a rope (as in, starting and ending in a flat-footed position) - you keep your heels up and hop on your toes, pushing off with the ***** of your feet, just as you're supposed to do at pretty much all times during a boxing match no matter what you're doing. (advancing, retreating, offense, defense - all movement should be done with the heels up, which rope skipping helps simulate and condition one to)
